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                                                               EXECUTION VERSION

                                  CONFIDENTIAL
     IP TELEPHONY SERVICES DISTRIBUTION AND INTERACTIVE MARKETING AGREEMENT

         This IP Telephony Services Distribution and Interactive Marketing
Agreement (this "Agreement"), dated as of November 19, 1999 (the "Effective
Date"), is between AOL, Inc., a Delaware corporation, with offices at 22000 AOL
Way, Dulles, Virginia 20166 ("AOL"), and Net2Phone, Inc. ("N2P"), a Delaware
corporation, with offices at 171 Main Street, Hackensack, NJ 07601. AOL and N2P
may be referred to individually as a "Party" and collectively as the "Parties."

                                  INTRODUCTION

         AOL is a provider of online communication services, including the AIM
Service. N2P is a provider of various IP Telephony services. The Parties wish
for N2P to develop and provide to AOL a customized version of certain N2P
Services that can be distributed through the AIM Service so as to enable AIM
Members to send and receive free, or low cost, Internet-enabled telephony
communications. This relationship is further described below and is subject to
the terms and conditions set forth in this Agreement. Defined terms used but not
defined in the body of the Agreement shall have the meanings ascribed to such
terms in Exhibit A hereto.

                                      TERMS

1.       AIM IP TELEPHONY SERVICES GENERALLY

1.1               Description of AIM IP Telephony Services. The N2P Services to
                  be offered collectively as the customized AIM IP Telephony
                  Services shall be comprised of the following:

                           1.1.1. PC-to-Fax Service. A PC-to-fax calling service
                  whereby AIM Members may send faxes from their PCs to a
                  facsimile machine of a third party.

                           1.1.2 Fax-to-PC Service. A fax-to-PC calling service
                  whereby AIM Members may receive faxes through their PCs from a
                  facsimile machine of a third party.

                           1.1.3. PC-to-Phone Service. A PC-to-telephone calling
                  service, which shall allow any AIM Member to originate a voice
                  conversation on an Internet-enabled PC (through use of the AOL
                  IP Telephony Software as distributed through the AIM Service
                  in accordance with the terms of this Agreement) and terminate
                  such conversation on a telephone located virtually anywhere in
                  the world (the "PC-to-Phone Service").

                           1.1.4. Phone-to-PC Service. A telephone-to-PC calling
                  service, which shall allow any AIM Member to originate a voice
                  conversation from a telephone and terminate such voice
                  conversation on an Internet-enabled PC (through use of the AOL
                  IP Telephony Software as distributed through the AIM Service
                  in accordance with the terms of this Agreement) (the
                  "Phone-to-PC Service"). Such calls shall be initiated by any
                  such AIM Member by dialing a local and/or toll-free N2P access
                  number (i.e., a local POP) and entering any such AIM Member's
                  account number and PIN, and then the number of the receiving
                  party. The Phone-to-PC Service generally shall enable
                  telephone conversations with any AIM Member online even if
                  such AIM Member is also using his or her only telephone line
                  for online access.

                           1.1.5. Phone-to-Phone Calling Card Service. A
                  telephone-to-telephone calling card service using IP
                  Telephony, which shall allow any AIM Member to call a third
                  party


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                                                               EXECUTION VERSION


                  by dialing a local and/or toll-free N2P access number (i.e.,
                  local POP) and entering the AIM Member's account number and
                  PIN, and then dialing the phone number of the person whom such
                  AIM Member is calling (the "PTP Calling Card Service"). The
                  PTP Calling Card Service shall use the AIM Card (as defined in
                  Section 4.3). For the avoidance of doubt, the Parties
                  acknowledge that the PTP Calling Card Service shall include
                  fax-to-fax service.

                           1.1.6. Conference Calling Service. A conference
                  calling service, which shall allow conference calls initiated
                  from a combination of phones and/or Internet-enabled PCs (the
                  "Conference Calling Service").

                           1.1.7. Fax-to-Fax Service. A fax-to-fax service using
                  IP Telephony which shall allow any AIM Member to fax a third
                  party by dialing a local and/or toll-free N2P access number
                  (i.e., local POP) and entering the AIM Member's account number
                  and PIN, and then dialing the fax number of the person to whom
                  such AIM Member is sending a fax, which uses the AIM Card,
                  pursuant to Section 1.1.5.

                           1.1.8. Optional Services.

                                    (a) AOL shall provide N2P with a [****] with
                           respect to the provision of the following additional
                           services as additional AIM IP Telephony Services:
                           [****] the AIM Client or the Worldwide Web; (iv)
                           [****] (the [****] aforementioned services,
                           collectively, the "Optional Services" and each, an
                           "Optional Service"). [****]

                                    (b) At any point during the Term, AOL shall
                           have the option, but not the obligation, in AOL's
                           sole discretion to include the PC-to-PC Service as
                           part of the AIM IP Telephony Services. In such event,
                           AOL agrees that N2P shall provide such PC-to-PC
                           service, and such PC-to-PC Service shall constitute
                           an additional Core Premium Service, according to the
                           terms and conditions set forth in this Agreement
                           pursuant to such Core Premium Services.
                            Such PC to PC Service shall be provided to AIM
                           Members without a per minute or other similar charge.

                                    (c) In addition to the foregoing, if during
                           Year One or Year Two AOL develops and implements
                           third party AIM talk functionality into a directory
                           for AIM Members within the AIM Service, and such
                           directory is fully-owned or controlled by AOL and
                           does not link to any third party site (excluding any
                           third party data source), and AOL elects, in its sole
                           discretion, to include IP Telephony Services in such
                           directory (the "Click to Talk Service"), then N2P
                           shall provide such Click To Talk Service, and such
                           Click To Talk Service shall constitute an additional
                           Core Premium Service, according to the terms and
                           conditions set forth in this Agreement, at no charge
                           to AOL or AIM Members.

                                    (d) Notwithstanding the foregoing, the
                           provision of such PC to PC Service or any other Core
                           Premium Service by N2P shall not be designed to
                           compromise the [****].

         N2P acknowledges, for the avoidance of doubt, that the right to access
         the AIM IP Telephony Services initially [****] to AIM Members, provided
         that N2P reserves the right [****] consistent with its obligations
         under Sections 3.1 and 3.3. In addition to the foregoing services, N2P
         shall (i) provide APIs, or SDKs, as the case may be, and (ii) to the
         extent commercially reasonable (a) provide connection for AOL to N2P's
         local equipment and (b) assist finding space for AOL and its Affiliates
         to locate equipment along with or near N2P's local equipment to enable
         AOL and its partners to link into aspects or features of the AOL IP
         Telephony System to provide related services (e.g., voice messaging);
         provided, however, that any such arrangement shall be subject


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                                                               EXECUTION VERSION


         to the mutual agreement of the Parties as to the reasonable terms and
         conditions for such arrangement.

         1.2      Performance. Each Party shall cause all aspects of the AIM IP
                  Telephony Services within its control, including customer
                  service and billing, network coverage and performance and
                  fraud detection, to comply in all material respects with the
                  applicable standards set forth on Exhibits B, C and D.

         1.3      Launch Cutoff

                           1.3.1 Cutoff Dates. N2P shall cause (i) the PTP
                  Calling Card Service to be fully prepared for launch on the
                  AIM Service within [****] following the Effective Date; and
                  (ii) each of the Secondary AIM IP Telephony Services to be
                  fully prepared for launch on the AIM Service by the respective
                  cutoff dates therefor set forth on Exhibit I to this Agreement
                  (each such date in clauses (i) and (ii) above, a "Cutoff
                  Date," and collectively, the "Cutoff Dates"). If any Core
                  Premium Service is not fully prepared for launch by the
                  applicable Cutoff Date in any particular country, AOL shall
                  have the right to terminate the exclusivity (as set forth in
                  Section 9 of this Agreement) with respect to such Core Premium
                  Service in that country, and thereby enter into an agreement
                  with any third party (including a N2P Competitor) with respect
                  to such Core Premium Service in such country(s); provided,
                  however, that in the event any such Core Premium Service is
                  not fully prepared for launch by the applicable Cutoff Date in
                  the United States, then AOL shall have the right to terminate
                  the exclusivity worldwide (as set forth in Section 9 of this
                  Agreement) with respect to such Core Premium Service(s) that
                  is or are not fully prepared for launch by the applicable
                  Cutoff Date , and thereby enter into an agreement with any
                  third party (including a N2P Competitor) with respect to such
                  Core Premium Service(s).

                           1.3.2 AOL Assistance. To the extent that it shall be
                  reasonably necessary for AOL to undertake any activities
                  within AOL's reasonable control (including providing
                  information or materials) reasonably requested by N2P in order
                  to enable N2P to fulfill its development and deployment
                  obligations and meet any Cutoff Date, AOL shall undertake any
                  such activities in a timely manner.

                           1.3.3 Excusable Delays. Each applicable Cutoff Date
                  and N2P's obligation to provide the Core Premium Services
                  thereafter (together with any rights of AOL related thereto,
                  including, without limitation, any right to terminate this
                  Agreement or any exclusivity hereunder) shall be deemed
                  extended, subject to the remainder of this Section 1.3.3, to
                  the extent (and only for the duration in which): (i) AOL fails
                  to undertake the reasonably requested and reasonably necessary
                  activities described in Section 1.3.2 with respect to any Core
                  Premium Service, and N2P has provided AOL with reasonable
                  informal notice (e.g., by e-mail message to the AOL Technical
                  Liaison or through discussion at the quarterly meetings
                  described in Section 2.8) of such failure and of its causal
                  effect on N2P's ability to meet any such Cutoff Date (an "AOL
                  Delay"); (ii) there is (or is reasonably expected to be) a
                  U.S. or other regulation which would prevent N2P from offering
                  a Core Premium Service (or which such regulation would make it
                  commercially unreasonable for N2P to offer any such Core
                  Premium Service (in such country)) (collectively, a
                  "Regulatory Event"); or (iii) any other Force Majeure Event
                  occurs. The Parties, through the Management Committee, shall
                  determine in good faith the period by which the Cutoff Date is
                  to be extended (or any other obligations or criteria that are
                  to be affected), if at all, by any of the events described in
                  this Section 1.3.3; provided, however, that, unless otherwise
                  agreed by the Parties, the extension of any Cutoff Date
                  resulting from any Regulatory Event or Force Majeure Event
                  shall not exceed [****] in the aggregate. In the event that a
                  Regulatory Event or Force Majeure Event affects N2P
                  Competitors generally with respect to the provision of the PTP
                  Calling Card Service, then AOL shall discuss with N2P in good
                  faith extending the Cutoff Date beyond such [****] period. For
                  the avoidance of doubt, any extension of a Cutoff Date


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                                                               EXECUTION VERSION


                  due to an AOL Delay shall be as mutually agreed upon in
                  writing by the Parties.

         1.4      Launch Dates. The Parties shall record the date on which each
                  AIM IP Telephony Service is launched (each such date, a
                  "Launch Date") in a written instrument signed by both Parties
                  promptly following any such Launch Date; provided, however,
                  that in the event that the Parties cannot agree as to the
                  definitive Launch Date with respect to a particular AIM IP
                  Telephony Service, the Parties shall submit such Dispute to
                  the dispute resolution provisions set forth in Section 17 of
                  this Agreement.

2.       DEVELOPMENT OBLIGATIONS

         2.1      Initial Version. The initial version of each of the AIM IP
                  Telephony Services shall be developed by N2P, by customizing
                  each of the existing N2P Services as set forth in Sections
                  1.1.1 through 1.1.7 to conform to the product specifications
                  set forth in Exhibit B to this Agreement (collectively,
                  together with such modifications thereto or any such
                  additional specifications as may be agreed to in writing by
                  the Parties after the Effective Date, the "Specifications").
                  As part of such customization, the N2P Services shall be
                  developed to function in an integrated manner with the
                  operation of the AIM Client to the extent set forth in the
                  Specifications or elsewhere in this Agreement (including, but
                  not limited to, the provision of SDKs to AOL in connection
                  with Section 10.1.2). Without limiting the foregoing,
                  throughout the Term, N2P shall support on the AIM Service
                  (i.e., through integration of voice over IP ("VOIP")
                  applications) any AOL or third party communications platform
                  that AOL reasonably requests (i.e., considering the time
                  necessary for N2P to deliver and the technological
                  capabilities of N2P or its contractors) from N2P and/or adopts
                  for the AIM Service, including unified messaging, voice
                  messaging, audio, video, etc. (the "Platform Support").
                  [****]. N2P shall cooperate with AOL in documenting and
                  perfecting all of AOL's rights with respect to such
                  development, including executing any necessary assignments,
                  applications or documentation with respect to such
                  development. Such Platform Support shall include, without
                  limitation, providing AOL with APIs, SDKs, or other necessary
                  tool kits to Seamlessly Integrate the AIM IP Telephony
                  Service(s) into such other AOL platforms and/or communications
                  functionality as designated by AOL, and shall not constitute
                  an Additional AOL Modification pursuant to Section 2.3 below.
                  Notwithstanding the foregoing, in the event that N2P fails to
                  provide AOL with such Platform Support as set forth in this
                  Section 2.1, then N2P shall provide AOL with any and all
                  functionality necessary for AOL (or its contractors) to
                  perform such Platform Support, in accordance with the Limited
                  Source Code License set forth in Section 10.2.2.

                  To the extent that any material conflict exists between (i)
                  Exhibit B to this Agreement and (ii) the provisions of the
                  principal body of this Agreement, the principal body of this
                  Agreement (i.e., Sections 1 through 18 hereof) shall govern.

         2.2      Updates.

                           2.2.1 Notification of Updates. If, during the Term,
                  N2P develops any Update of any N2P Service that is generally
                  commercially available to users of the N2P Services, N2P
                  shall, in each such case, (i) promptly notify AOL of such
                  Update and (ii) promptly (i.e., in the shortest commercially
                  reasonable time period) include such Update (provided that
                  such Update complies with the Specifications or the terms of
                  this Agreement) in the applicable AIM IP Telephony Service.

                           2.2.2 No Notification Required. N2P shall not be
                  obligated to notify AOL of or to provide to AOL any
                  modification, improvement, addition, deletion, feature or
                  functionality


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                                                               EXECUTION VERSION


                  of the N2P Services provided by N2P to another customer if
                  such modification, improvement, addition, deletion, feature or
                  functionality is subject to contractual restrictions that
                  would prohibit N2P from providing it to AOL hereunder. For the
                  avoidance of doubt, the Parties acknowledge that N2P shall not
                  be required to notify AOL of or provide to AOL any
                  modification, improvement, addition, deletion, feature or
                  functionality of any Optional Service, Expanded Service or
                  other IP Telephony Service (apart from any Core Premium
                  Service) unless the Parties have agreed to the provision by
                  N2P to AIM Members of any such service pursuant to the terms
                  of this Agreement.

                           2.2.3 Disagreement. In the event of any disagreement
                  between the Parties regarding the provision by N2P of any such
                  Updates to AOL (e.g., as to whether any such Update is
                  generally commercially available, the length of the time
                  period in which any such Update is to be implemented, etc.),
                  such disagreement shall be submitted to the Management
                  Committee pursuant to Section 17 of this Agreement.

         2.3      Additional AOL Modifications.

                           2.3.1 Definition. AOL may in its discretion, from
                  time to time during the Initial Term, request that N2P, to the
                  extent commercially reasonable, (i) add new functionality or
                  features to any AIM IP Telephony Service(s), (ii) modify
                  elements related to the AOL GUI (but not elements of the AOL
                  GUI itself), and/or (iii) modify the AIM IP Telephony Services
                  in connection with modifications of the AIM Client and AIM
                  Service (which modifications shall be subject to Section 2.7
                  and which modifications AOL estimates will occur at least
                  twice a year), (each of (i), (ii) and (iii) above, an
                  "Additional AOL Modification"). The Parties agree that any
                  features, functionality, additions, deletions or other
                  modifications necessary to be carried out by N2P in order for
                  N2P to comply with its obligations under Section 3 of this
                  Agreement (collectively, the "Necessary Modifications") shall
                  not constitute Additional AOL Modifications and that [****].

                           2.3.2 Request for Non-Substantial Modification. In
                  the event that AOL requests Additional AOL Modifications that
                  N2P reasonably believes would not involve (i) a substantial
                  cost or expense to N2P (i.e., [****] in the aggregate during
                  any Year of this Agreement) or (ii) a substantial commitment
                  of N2P personnel, N2P shall develop the Additional AOL
                  Modifications in cooperation with AOL on a schedule to be
                  mutually agreed upon by the Parties. Each Party shall allocate
                  development resources on a high priority basis to complete
                  such Additional AOL Modifications in accordance with such
                  schedule.
                  [****].

                           2.3.3 Request for Substantial Modification. In the
                  event that AOL requests an Additional AOL Modification that
                  N2P reasonably believes would involve a substantial cost or
                  expense to N2P, or a substantial commitment of N2P personnel,
                  the Parties shall negotiate in good faith regarding the
                  request for such Additional AOL Modification, including,
                  without limitation, the appropriate schedule for development
                  and deployment, rights to the results of the development,
                  interoperability requirements, and the relevant business terms
                  (e.g., amount of any payments for the development, the revenue
                  model for the features or functions, etc.). If and when the
                  Parties reach agreement on the terms and conditions for such
                  Additional AOL Modification, N2P shall develop the Additional
                  AOL Modification in cooperation with AOL, and each Party shall
                  allocate development resources on a high priority basis to
                  complete such Additional AOL Modification in accordance with
                  such schedule.

                           2.3.4 Commissioned Works. Notwithstanding the
                  foregoing, in the event that the Parties are unable to agree
                  as to the development or deployment of any Additional AOL
                  Modification in accordance with Section 2.3.3, AOL shall have
                  the right during the Initial


                                       5
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                                                               EXECUTION VERSION


                  Term to require N2P to assist AOL in securing a mutually
                  agreed-upon third party to develop any such Additional AOL
                  Modifications for AOL; provided, however, that either N2P or
                  (at AOL's option) AOL may perform such development. In the
                  event that a third party is secured to perform such
                  development, N2P will use commercially reasonable efforts to
                  assist such third party in performing such development. Any
                  development by any such third parties shall not be considered
                  the responsibility of N2P, and such third parties shall not be
                  considered contractors of N2P. To the extent that portions of
                  such Additional AOL Modifications (including intellectual
                  property rights therein) are developed by N2P specifically for
                  AOL pursuant to this Section 2.3.4, such portions shall be
                  considered "Commissioned Works," but "Commissioned Works"
                  shall exclude, any software, modules, routines or subroutines,
                  documentation or other materials, and any methods, processes,
                  techniques or inventions, that were (i) developed by or for
                  N2P prior to such development for AOL or (ii) developed
                  independently by or for N2P (i.e., independent of the
                  development carried out for AOL under this Section 2.3.4 by
                  N2P). To the extent that (a) N2P develops any Commissioned
                  Works pursuant to this Section 2.3.4 without requiring that
                  AOL pay for such Commissioned Works (in cash or such other
                  consideration as may be agreed to by the Parties), then N2P
                  shall own all right, title and interest in and to such
                  Commissioned Works (provided, however, that in such case, AOL
                  shall have a fully paid-up, [****], non-exclusive,
                  non-transferable and worldwide license for the Term to use,
                  reproduce, directly and indirectly distribute, transmit,
                  display, perform, sublicense and adapt such Commissioned
                  Works), (b) [****] for any such Commissioned Works pursuant to
                  this Section 2.3.4, then AOL shall own all right, title and
                  interest in and to such Commissioned Works, and (c) the
                  Parties so agree, the Parties shall co-own all right, title
                  and interest in and to such Commissioned Works, which shall be
                  treated as Joint Work Product for purposes of this Agreement.
                  Each Party shall cooperate with the other Party in documenting
                  and perfecting all rights with respect to the Commissioned
                  Works, including executing any necessary assignments,
                  applications or other documentation with respect to the
                  Commissioned Works.

                           2.3.5 Disagreement. In the event that the Parties
                  disagree as to the development or deployment of any Additional
                  AOL Modification, including any disagreement as to the terms
                  and conditions for the development or deployment thereof, the
                  Parties shall submit such Dispute to the Management Committee
                  in accordance with the terms of Section 17 of this Agreement.

         2.4      Expansion to Cover Other Services and Platforms of AOL.

                           2.4.1 Request by AOL to Encompass Expanded Service
                  Within an AOL Telephony Service. AOL may in its discretion,
                  from time to time during the Initial Term, seek to expand any
                  AIM IP Telephony Service(s) to provide service through any and
                  all platforms and services hereafter offered by AOL or an
                  Affiliate of AOL (other than the AIM Service) (the "Expanded
                  Services"). In such event, AOL may in its discretion request
                  that N2P develop or deploy or assist with the development or
                  deployment of any such Expanded Services. Upon the receipt of
                  any such request, and before any development or deployment of
                  any Expanded Services, the Parties shall negotiate in good
                  faith regarding the request for any such Expanded Services,
                  including, without limitation, with respect to the appropriate
                  schedule for any development and deployment, and the relevant
                  business terms (e.g., the amount of any payments for any
                  development, the revenue model for the Expanded Services,
                  etc.). If and when the Parties reach agreement on the terms
                  and conditions related to the development and deployment of
                  such Expanded Services, each Party shall allocate development
                  and deployment resources on a high priority basis towards the
                  development and deployment of an updated version of the
                  applicable AOL IP Telephony Software to support such Expanded
                  Services in accordance with the terms and conditions agreed
                  upon by the Parties.

                           2.4.2 Failure to Agree. In the event that the Parties
                  disagree as to the development or deployment of any Expanded
                  Service, including any disagreement as to


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                                                               EXECUTION VERSION


                  the terms and conditions for the development or deployment
                  thereof, the Parties shall submit such Dispute to the
                  Management Committee in accordance with the terms of Section
                  17 of this Agreement; provided, however, that in the event
                  that the Management Committee is unable to agree as to the
                  terms and conditions regarding such development and
                  deployment, such Expanded Service shall not constitute an AIM
                  IP Telephony Service for purposes of this Agreement, and N2P
                  shall not have any rights or obligations with respect to such
                  Expanded Service.

                           2.4.3 Agreement. Nonetheless, if the Parties agree to
                  add an Expanded Service to this Agreement, such Expanded
                  Service, for all purposes hereof, shall be considered part of
                  the AIM IP Telephony Services, and all rights and obligations
                  of AOL and N2P hereunder shall apply to such Expanded Service
                  and users of such services shall be considered AIM Members for
                  purposes of this Agreement. For purposes of calculating the
                  Revenue Share and the Revenue Threshold hereunder, any such
                  agreed-upon Expanded Service shall be aggregated with the AIM
                  IP Telephony Services as if only one service existed (unless
                  otherwise agreed upon by the Parties).

                             2.4.4 Migration. Throughout the Term, AOL shall
                  have the right, in its sole discretion, to require N2P,
                  [****], to migrate and/or route any and all voice over IP
                  traffic in connection with the PC-to-PC Service (as
                  applicable), the PC-to-Phone Service, or any and all other
                  Core Premium Services, as applicable, to servers, protocols,
                  or platforms in connection with standards designated by AOL,
                  provided that: (i) such migration shall not affect N2P's right
                  to revenues pursuant to Section 7 of this Agreement; and (ii)
                  the quality of the AIM IP Telephony Services is not materially
                  degraded below generally recognized industry standards
                  accepted by AOL for VOIP services, resulting solely from the
                  fault of AOL in connection with such migration. In such event,
                  N2P shall provide AOL, or any third party designated by AOL,
                  with a peering agreement from the AOL designated server(s) to
                  N2P's network, on terms to be mutually agreed to by the
                  Parties, in connection with any and all such traffic (e.g.,
                  for termination or pass-through purposes). AOL acknowledges
                  that N2P shall not be deemed in breach for its failure to meet
                  its performance obligations set forth in Sections 3.2 and 3.3
                  if such failure is due solely to N2P's compliance with the
                  requirements of this Section 2.4.4.

         2.5      Delivery and Acceptance.

                           2.5.1 Initial Versions. Following the completion of
                  the development and internal testing of each initial version
                  of the Core Premium Services, N2P shall deliver each such
                  initial version to AOL for evaluation and acceptance in
                  accordance with the delivery dates set forth on Exhibit I
                  hereto. AOL shall have thirty (30) days following such
                  delivery by N2P to evaluate whether each such initial version
                  functions in accordance with the Specifications and without
                  any Severity 1 or Severity 2 Problems. If AOL reasonably
                  determines that any such initial version of any Core Premium
                  Service does not function in material conformity with the
                  Specifications and/or without Severity 1 or Severity 2
                  Problems, AOL may reject such version by providing N2P with
                  written notice within such thirty (30) day period specifying
                  in detail the reason for rejection. Any initial version of the
                  Core Premium Services that has not been so rejected within
                  such thirty (30) day period shall be deemed accepted. If AOL
                  rejects any initial version of any Core Premium Service, then
                  following such rejection, N2P shall use commercially
                  reasonable efforts to correct (as promptly as commercially
                  possible but in any case by the applicable Cutoff Date) in all
                  material respects, the deficiencies in such initial version
                  that were specified in AOL's notice of rejection. If the
                  deficiencies specified in any such AOL notice of rejection
                  have not been remedied in all material respects by such Cutoff
                  Date, AOL shall have the right to terminate the exclusivity
                  (as set forth in Section 9 of this Agreement) with respect to
                  such Core Premium Service and thereby enter into an agreement
                  with any third party (including a N2P Competitor) with respect
                  to such Core Premium Service.


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                                                               EXECUTION VERSION


                           2.5.2 Subsequent Versions. Following the completion
                  of the development and internal testing of each subsequent
                  version (i.e., subsequent to the initial version) of any Core
                  Premium Service (or any initial version of any Optional
                  Service, Expanded Service or other IP Telephony service
                  mutually agreed upon by the Parties to be provided by N2P
                  hereunder) (each, a "Subsequent Version"), N2P shall deliver
                  each such Subsequent Version to AOL for evaluation and
                  acceptance. AOL shall have thirty (30) days following such
                  delivery by N2P to evaluate whether such Subsequent Version
                  functions in accordance with the Specifications and without
                  any Severity 1 or Severity 2 Problems. If AOL reasonably
                  determines that any such Subsequent Version does not function
                  in material conformity with the Specifications and without
                  Severity 1 or Severity 2 Problems, AOL may reject such
                  Subsequent Version by providing N2P with written notice within
                  such thirty (30) day period specifying in detail the reason
                  for rejection. Any Subsequent Version that has not been so
                  rejected within such thirty (30) day period shall be deemed
                  accepted.

                           2.5.3 Acceptance Process. The acceptance criteria set
                  forth in Sections 2.5.1 and Section 2.5.2 of this Agreement
                  shall not include as factors the Core AOL Obligations, and AOL
                  shall not withhold any such acceptance due to its failure to
                  comply with the Core AOL Obligations.

         2.6      Assistance from AOL. AOL shall provide N2P with reasonable
                  consultative assistance in connection with the development
                  obligations of N2P as set forth in this Section 2. In
                  addition, during the Term, AOL agrees to notify N2P in advance
                  of any modifications and/or changes to the AIM Service that
                  AOL believes may result in incompatibility between the
                  Parties' respective systems or interruptions in the AIM IP
                  Telephony Services (including without limitation, network
                  configuration changes and system maintenance). The Parties
                  shall work together to resolve any such potential or actual
                  incompatibility, or interruptions, in connection with AOL's
                  implementation of any such change and/or modification.

         2.7      Other Modifications. AOL reserves the right to redesign and/or
                  modify the organization, structure, "look and feel,"
                  navigation, features and other elements of the AIM Client, the
                  AIM Service and the AIM IP Telephony Services (subject to (i)
                  the technical limitations and design requirements of the N2P
                  Services and N2P System (which shall themselves remain subject
                  to the Specifications) and (ii) the requirement that such AIM
                  Service and AIM IP Telephony Services remain in compliance
                  with the terms and conditions of this Agreement. AOL shall
                  provide N2P with reasonable notice of any material proposed
                  redesign and/or modification in advance of developing such
                  redesign or modification, and the Parties shall consult in
                  good faith on how to avoid any adverse effect on the AOL
                  Telephony Services (including, without limitation, any adverse
                  effect on the functionality or performance thereof) as a
                  result of such redesign and/or modification. Such notice shall
                  be sufficiently in advance of the proposed redesign or
                  modification such that the Parties will have a reasonable
                  opportunity to complete the process, and avoid the adverse
                  effect on the AIM IP Telephony Services, as contemplated by
                  this Section 2.7.

         2.8      Meetings. In furtherance of the rights and obligations of the
                  Parties under this Agreement, the Parties shall meet, in
                  person on a quarterly basis (the "Quarterly Meetings") and by
                  telephone on a monthly basis (the "Telephone Meetings"). With
                  respect to the four (4) Quarterly Meetings to take place
                  during each Year of the Initial Term, two (2) such Quarterly
                  Meetings shall take place in Virginia (at AOL headquarters or
                  such other location as mutually agreed upon by the Parties)
                  and the other two (2) such Quarterly Meetings shall take place
                  in the United States (at N2P headquarters or such other
                  location as mutually agreed upon by the Parties). The
                  Quarterly Meetings shall be used to discuss, inter alia,
                  long-term planning, strategic and development issues, and
                  marketplace and performance information regarding the
                  obligations and criteria applicable to the Parties hereunder
                  (including the obligations and criteria under Section


                                       8
<PAGE>   9
                                                               EXECUTION VERSION


                  3), and shall be attended by the Technical Liaisons and
                  appropriate senior development and management personnel. The
                  Parties anticipate that the first such Quarterly Meeting shall
                  occur as promptly as possible following the Effective Date but
                  in no event later than two (2) months following the Effective
                  Date. The Telephone Meetings shall be used to discuss, among
                  other things, the activities and relationship contemplated by
                  this Agreement, including the proposed implementation and/or
                  progress of any Updates or Additional AOL Modifications,
                  changes to the operating standards set forth on Exhibit B,
                  Exhibit C or Exhibit D hereto, AOL Exclusive Offers to be
                  provided during the subsequent quarter, and the redesign or
                  modification of elements of the AIM Service or AIM IP
                  Telephony Services.

         2.9      No Support for AOL Modifications. The Parties acknowledge that
                  any modifications or additions to the AIM IP Telephony
                  Services that are carried out by AOL (or carried out for AOL
                  by a third party not contracted or subcontracted by N2P) shall
                  not affect the determination of whether N2P has met its
                  obligations or the criteria set forth in Sections 1.3 or 3 of
                  this Agreement.

3.       N2P PERFORMANCE

         3.1      Pricing and Terms. [****]

         3.2      Operating Standards.

                  3.2.1 Compliance. During the Term, N2P will cause the AIM IP
                  Telephony Services to comply in all material respects with the
                  standards set forth in each of Exhibit B, Exhibit C and
                  Exhibit D. To the extent standards are not established in
                  Exhibits B, C or D with respect to any aspect of the AIM IP
                  Telephony Services, N2P will use commercially reasonable
                  efforts to provide such aspect at a level of quality,
                  completeness or timeliness which meets or exceeds prevailing
                  standards in the IP Telephony industry. Without limiting the
                  generality of the foregoing, N2P will use commercially
                  reasonable efforts to provide all hardware, software,
                  telecommunications lines and other infrastructure necessary to
                  meet traffic and usage demands on the AIM Service in
                  connection with the offering of the AIM IP Telephony Services.

                  3.2.2    N2P Technical Problem.

                                    (a) Occurrence; Cure Period. In the event of
                  any material technical problem (over which N2P exercises
                  control) affecting the use by AIM Members of any AIM IP
                  Telephony Service and constituting a Severity 1 Problem or
                  Severity 2 Problem (an "N2P Technical Problem"), AOL shall
                  have the right to suspend (i) distribution of such AIM IP
                  Telephony Service, (ii) any of AOL's promotional obligations
                  hereunder related specifically to such AIM IP Telephony
                  Service, and/or (iii) any Listings related specifically to the
                  such AIM IP Telephony Service until such time as N2P corrects
                  such N2P Technical Problem. Prior to suspending any such
                  distribution of any particular AIM IP Telephony Service,
                  related promotional obligations of AOL or related Listings
                  hereunder, AOL shall provide N2P with notice and an
                  opportunity to cure, as provided below, unless, in its
                  reasonable discretion, AOL will be materially and adversely
                  affected in a substantial manner by failing to act immediately
                  or at some subsequent time prior to the completion of the
                  notice and cure period. Any such notice shall be in writing
                  and shall contain a reasonably detailed explanation for AOL's
                  intention to suspend (and, in reasonable detail, the reasons
                  for suspending) access to the particular AIM IP Telephony
                  Service and related promotional obligations and Listings due
                  to the occurrence of the N2P Technical Problem. Upon receipt
                  of such notice, N2P will have at least [****] to cure the
                  applicable N2P Technical Problem to AOL's reasonable
                  satisfaction and, if cured, AOL shall not suspend the affected
                  AIM IP Telephony Service(s) and/or related promotional
                  obligations


                                       9
<PAGE>   10
                                                               EXECUTION VERSION


                  or Listings. AOL will make good faith efforts to facilitate
                  N2P's cure efforts and to extend the cure period as
                  appropriate, so long as AOL, in its reasonable discretion, is
                  not materially adversely affected by any such extension. In
                  the event AOL suspends distribution of any AIM IP Telephony
                  Service, any AOL promotional obligations and/or any Listings
                  due to the occurrence of any such N2P Technical Problem, AOL
                  will notify N2P in writing within [****] of such decision,
                  setting forth in reasonable detail the explanation therefor.

                                    (b) Cure; Resumption of Distribution. When
                  and if the cure to an N2P Technical Problem is demonstrated to
                  AOL's reasonable satisfaction, which satisfaction shall not be
                  unreasonably withheld, AOL shall resume distribution of the
                  affected AIM IP Telephony Service, promotional obligations and
                  Listings as soon as commercially practical; provided, however,
                  that (in addition to any other remedies available to AOL in
                  this Agreement, including, without limitation, in Section 16.6
                  hereof) in the event that N2P shall fail to cure any such N2P
                  Technical Problem within thirty (30) days following notice
                  thereof by AOL to N2P, then AOL shall have the right to
                  terminate the exclusivity (as set forth in Section 9 of this
                  Agreement) with respect to the Core Premium Service(s)
                  affected by such N2P Technical Problem and thereby enter into
                  an agreement with any third party (including any N2P
                  Competitor) to promote (or offer the services of) such third
                  party with respect to such Core Premium Service(s).

         3.3      Competitive Performance Standards. [****]

         3.4      [****] AOL. For the avoidance of doubt, the Parties
                  acknowledge that AOL [****] connection with any modification,
                  addition, deletion, feature or functionality or other
                  improvement required to be provided by N2P in order for N2P to
                  comply with its obligations under Section 3 of this Agreement.

         3.5      N2P Not Responsible for Core AOL Obligations. The Parties
                  acknowledge that the Core AOL Obligations shall not affect the
                  determination as to whether N2P has satisfied the criteria and
                  obligations set forth in Section 3 of this Agreement. The
                  Parties also acknowledge that the determination of whether N2P
                  has satisfied the criteria and obligations set forth in
                  Sections 3.1, 3.2 or 3.3 of this Agreement shall not be
                  affected by features or functionality that N2P offers to AOL
                  and that AOL (a) declines to implement or support or (b)
                  cannot (e.g., due to technological or operational constraints
                  within the control of AOL) reasonably implement or support,
                  provided that (i) in either such case, N2P provides AOL with
                  reasonable prior, informal, written notice (e.g., by e-mail)
                  of the anticipated effects of AOL's not implementing or
                  supporting the features or functions on the AIM IP Telephony
                  Services and (ii) in the case of technological or operational
                  constraints within AOL's control, N2P provides AOL with
                  reasonable prior informal notice of such constraints.

         3.6      Restrictions.

                  3.6.1 N2P will not integrate, or enter into an agreement to
                  integrate into any of the AIM IP Telephony Services or the N2P
                  IP Telephony Software, or in any other products or services
                  developed by or on behalf of N2P, instant messaging protocols,
                  components or other technology that use or access the AIM
                  Service, the AOL Service, or any other AOL-branded product or
                  service (e.g., ICQ, CompuServe) in a manner not expressly
                  authorized by AOL, or that AOL contends in good faith is not
                  expressly authorized, or distribute, market or promote any
                  products or services containing instant messaging protocols or
                  components or other technology that use or accesses the AIM
                  Service, or solicits, encourages or promotes end-users to use
                  or access the AIM Service, in a manner not expressly
                  authorized by AOL or that AOL contends in good faith is not
                  expressly authorized.


                                       10
<PAGE>   11
                                                               EXECUTION VERSION


                  3.6.2 Except as expressly provided herein, N2P shall not have
                  any right to (i) adapt, alter, copy, modify, translate or
                  create derivative works of the AIM Client, or (ii) reverse
                  engineer, decompile, disassemble, or otherwise attempt to
                  reconstruct the source code of, those portions of any AOL
                  software (e.g., the AIM Client) provided to N2P, as
                  applicable. N2P acknowledges that it obtains no intellectual
                  property rights or licenses by this Agreement except for those
                  licenses expressly granted, and that, except as otherwise
                  provided herein, AOL hereby expressly retains all of its
                  rights in and to the AIM Service, the AOL Namespace, the AOL
                  Service, and the AIM Client.

4.       DISTRIBUTION AND PROMOTION

         4.1      Distribution and Promotion Requirements. During the Term,
                  subject to the terms and conditions herein, the Parties agree
                  to the following:

                  4.1.1.   Access to AIM IP Telephony Services. AOL shall
                           distribute the AIM IP Telephony Services through the
                           AIM Service, provided that AOL shall determine in its
                           reasonable discretion (upon consultation with N2P)
                           the manner in which such distribution occurs (e.g.,
                           through the bundling with the AIM Client of the
                           AOL-customized N2P IP Telephony Software, through a
                           "plug-in" of such software, etc., or through
                           distribution of the AIM Client or a separate AIM
                           application which includes certain functionality or
                           services from N2P using the SDK provided to AOL
                           pursuant to Section 10.1.2).

                  4.1.2    Distribution of AOL IP Telephony Software.

                                    (a) PTP Calling Card Service. Promptly upon
                           the acceptance by AOL of the initial version of the
                           PTP Calling Card Service (including any Updates
                           thereto), AOL shall promote and distribute such
                           initial version as part of the AIM Service subject to
                           the remainder of this Section 4.1.2.

                                    (b) Secondary AIM IP Telephony Services.
                           Following the acceptance by AOL of the initial
                           version of any Secondary AIM IP Telephony Service
                           (including any Updates thereto) and subject to the
                           remainder of this Section 4.1.2, AOL shall promote
                           and distribute such accepted Secondary AIM IP
                           Telephony Service as part of the AIM Client and
                           related version of the AIM Service. AOL shall launch
                           (i.e., make generally commercially available) such
                           AIM Client and version of the AIM Service no later
                           than [****]; provided, however, that in the event
                           that AOL shall not have launched the AIM Client and
                           related version of the AIM Service by [****] (as
                           N2P's sole and exclusive remedy hereunder), the
                           Initial Term shall be extended by one day for each
                           day beyond [****] that AOL fails to launch the AIM
                           Client and related version of the AIM Service.
                           Notwithstanding the foregoing, in the event AOL's
                           failure to distribute such accepted Secondary AIM IP
                           Telephony Service(s) by [****] due solely to AOL's
                           inability to integrate N2P's functionality or
                           services using the SDK (without fault of N2P), then
                           AOL shall distribute such AIM IP Telephony Service
                           through bundling the AOL IP Telephony Software with
                           the AIM Client or through integration using the SDK
                           no later than [****], provided that N2P shall have
                           delivered the SDK to AOL in accordance with Section
                           10.1.2.

                                    (c) Subsequent Versions. Following the
                           acceptance by AOL of any Subsequent Version, AOL will
                           distribute such Subsequent Version with the AIM
                           Service within a time period [****] to be determined
                           by AOL in its reasonable discretion (e.g., taking
                           into account such factors as the imminence of the
                           launch of a new version of the AIM Client, etc.),
                           upon consultation with N2P.


                                       11
<PAGE>   12
                                                               EXECUTION VERSION


                  4.1.3    Educational Promotions of AIM IP Telephony Services.
                           Upon the Launch Date of any of the AIM IP Telephony
                           Services, AOL will use good faith efforts, in AOL's
                           sole discretion, to educate AIM Members, through the
                           AIM controlled properties, of how to access and use
                           such AIM IP Telephony Service(s).

                  4.1.4    N2P Listing and Promotion. AOL shall feature, offer
                           and promote the AIM IP Telephony Services prominently
                           in the AIM Service.

                                    (a) In furtherance and as part of the
                           foregoing, the initial implementation of such
                           promotional requirement shall include, where
                           feasible, at AOL's sole discretion, the following
                           (and any future implementation shall be consistent in
                           terms of prominence (e.g., in terms of size,
                           location, appearance and the like) with the
                           following):

                                            (i) Each AIM IP Telephony Service
                           will be "sub-branded" with the name "Net2Phone,"
                           "N2P" or any other N2P Mark designated by N2P,
                           subject to the approval of AOL not to be unreasonably
                           withheld (the "N2P Name"). "Sub-branding" means that
                           each AIM IP Telephony Service will be labeled and
                           marketed with the name [****] or such other AOL name
                           as AOL designates (the "AOL Name"), but that each
                           such AIM IP Telephony Service shall, where feasible
                           and to the extent not inconsistent with the AOL Look
                           and Feel, have a prominent tag line such as [****] or
                           [****] and a N2P Mark. The N2P tag line and Mark (the
                           "Brandings") will be included prominently in (and
                           where feasible, will be placed within reasonable
                           proximity to the AOL brandings in) the (A) areas
                           which provide information regarding the use of and
                           enable AIM Members to launch the AIM IP Telephony
                           Service (collectively, the "Support Area"), (B) other
                           areas within the AIM Service that relate principally
                           to the AIM IP Telephony Services (e.g., [****]), and
                           (C) the AOL IP Telephony Software or areas within the
                           AIM Client that relate principally to an AIM IP
                           Telephony Service (the "Branded Areas").

                                            (ii) The Brandings will also appear
                           prominently in advertising, promotional, public
                           relations and marketing material relating principally
                           to the AIM IP Telephony Services.

                                            (iii) There will be links (evidenced
                           by the AOL Name or a graphical image of a telephone,
                           or such other link as AOL selects) to the
                           PC-originated AIM IP Telephony Services (initially,
                           the PC-to-Phone Service) throughout the AIM Service
                           in areas providing AIM Members with the ability to
                           perform communication functions (e.g., [****])
                           (collectively, the "Links"). The Links will launch
                           the AIM IP Telephony Services.

                                    (b) The name, design and "look and feel" of
                           the Branded Areas, the Brandings and the Links
                           (collectively, the "Listings") will be determined by
                           AOL in its reasonable discretion in consultation with
                           N2P. The Listings will properly convey the
                           functionality of the AIM IP Telephony Services.

                                    (c) AOL generally will provide to N2P
                           branding, marking and promotion that are no less
                           prominent, in terms of size, placement, appearance
                           and the like, than those accorded to [****]. In the
                           event that AOL begins to sell advertising inventory
                           on [****] of the AIM Client, AOL shall provide N2P
                           with an opportunity to bid on the purchase of a
                           placement within such inventory.

                                    (d) Subject to the other requirements of
                           this Section 4.1.4, Section 9.1.1, and the other
                           provisions of this Agreement, the foregoing will not
                           preclude users from linking to another such provider
                           from the AIM Service, provided that the link to such
                           other provider is limited to [****] that is no more
                           prominent than any similar reference to N2P. Nothing
                           in this Agreement shall prevent AOL from offering
                           (whether through buttons, icons or otherwise) an AOL
                           PC-to-PC communication function on the AOL Service or
                           the AIM Service.


                                       12
<PAGE>   13
                                                               EXECUTION VERSION


                  4.1.5    Promotion of AIM Service. N2P shall promote AOL or
                           the AIM Service to its customers and partners, and
                           shall use reasonable efforts to encourage such
                           customers and partners to adopt the AIM Service as an
                           integrated component of the IP Telephony products and
                           services provided to such customers and partners by
                           N2P, as and to the extent set forth in Exhibit E. All
                           promotion of the AIM Service by N2P hereunder,
                           including, without limitation, any and all such
                           promotional materials distributed by or authorized by
                           N2P shall be subject to AOL's prior written consent.
                           AOL shall assist N2P, as reasonably requested by N2P,
                           in such promotional efforts. In addition to the
                           foregoing, all promotion of the N2P Services by AOL
                           hereunder, including, without limitation, any and all
                           such promotional materials distributed by or
                           authorized by AOL shall be subject to N2P's prior
                           written consent.

         4.2      General Conditions to Distribution and Promotional
                  Obligations. Notwithstanding anything contained in this
                  Section 4, AOL shall have no obligation to promote a
                  particular version of the AIM IP Telephony Services, to
                  distribute to AIM Members a particular version of the AIM IP
                  Telephony Services or to provide any Listing therefor to the
                  extent that and for so long as:

                           (i) AOL has received notice (whether written or
                  verbal) of, and reasonably believes, that the reproduction,
                  use or distribution of such version of the AIM IP Telephony
                  Services in accordance with this Agreement infringes or
                  misappropriates the intellectual property rights of any third
                  party, provided that AOL may not promote or offer access to
                  any other similar IP Telephony product unless AOL reasonably
                  believes that it raises a lesser risk of infringement or
                  misappropriation; or

                           (ii) An aspect of any such version of the AIM IP
                  Telephony Service exists, other than an acknowledged security
                  risk that a corporation/user accepts by opening up holes in
                  its firewall to enable use of any such AIM IP Telephony
                  Service (and other than security risks ordinarily associated
                  with Web-based communications products), that could be
                  exploited in a manner that AOL reasonably believes (a) would
                  expose AIM Members to potential efforts to invade their
                  privacy or damage or modify data, software or hardware in an
                  unauthorized manner or (b) would otherwise result in
                  meaningful and serious claims that any such AIM IP Telephony
                  Service presents a security risk to its users, provided that
                  AOL may not promote or offer access to any other similar IP
                  Telephony product unless AOL reasonably believes that it
                  raises a lesser security risk.

         4.3      Exclusive Offers/AIM Member Benefits. N2P shall offer through
                  the AIM Service on a regular and consistent basis (but no less
                  than once per quarter) special offers comparable to those
                  available through Additional N2P Channels (e.g., preferred
                  rates to specific termination points to be offered
                  periodically, raffle or sweepstakes conducted from time to
                  time, etc.), which such special offers shall be exclusively
                  available to AIM Members (the "AOL Exclusive Offers"). Each
                  AOL Exclusive Offer made available by N2P shall provide a
                  substantial member benefit to AIM Members, either by virtue of
                  a meaningful price discount, product enhancement, unique
                  service benefit or other special feature. N2P will provide AOL
                  with reasonable prior notice of AOL Exclusive Offers so that
                  AOL can market the availability of such AOL Exclusive Offers
                  in the manner AOL deems appropriate in its reasonable
                  discretion; provided that AOL shall consult with N2P regarding
                  the marketing of the AOL Exclusive Offers. In addition to the
                  foregoing, the Parties shall create a virtual and/or physical
                  debit card to be used in connection with the AIM IP Telephony
                  Services and/or any other products or services as determined
                  by AOL in its sole discretion (the "AIM Card").

         4.4      Limited Waiver. To the extent that any of N2P's obligations
                  under this Agreement are expressly inconsistent with N2P's
                  obligations to ICQ, Inc. ("ICQ") (pursuant to N2P's July 15,
                  1999 agreement with ICQ, Inc.), CompuServe Interactive
                  Services, Inc. ("CompuServe") (pursuant to CompuServe's
                  agreement with N2P dated as of November 19, 1999) or any other
                  agreement with any other AOL Affiliate existing as of the
                  Effective Date (collectively,


                                       13
<PAGE>   14
                                                               EXECUTION VERSION


                  the "Inconsistent Obligations"), and to the extent that such
                  Inconsistent Obligations may reasonably restrict N2P from
                  materially performing its obligations under this Agreement,
                  then N2P shall provide notice to AOL immediately upon its
                  discovery of such Inconsistent Obligations. Promptly after
                  AOL's receipt of such notice from N2P, AOL and N2P shall work
                  together in good faith to work around or obtain a waiver from
                  ICQ, CompuServe or such other AOL Affiliates of such
                  Inconsistent Obligations. To the extent that the Parties
                  cannot or do not obtain relief in connection with such
                  Inconsistent Obligations, then AOL shall have the option, in
                  its sole discretion, to: (a) waive such inconsistency in this
                  Agreement and instruct N2P to perform all of its obligations
                  under this Agreement and such other agreement(s), including
                  any and all such Inconsistent Obligations; or (b) elect under
                  which of the applicable agreements for N2P to perform such
                  Inconsistent Obligations. Notwithstanding the foregoing,
                  nothing contained in this Section 4.4 shall be construed in
                  any manner whatsoever to provide N2P with an excuse for
                  non-performance under this Agreement, and except as expressly
                  provided herein, AOL reserves any and all of its rights in
                  connection with N2P's failure to perform under this Agreement.

5.       AIM MEMBER REGISTRATION AND INFORMATION

         5.1      Ownership of Assets and Customer Relationships. In addition to
                  the provisions of Section 12.1, AOL shall own all tangible and
                  intangible assets (and all personal and intellectual property)
                  provided by AOL in developing the AIM IP Telephony Services
                  (except as otherwise expressly set forth herein) and the
                  Support Area, including all materials provided by AOL to N2P
                  for the purpose of branding the AIM IP Telephony Service and
                  the Support Area ("AOL Branding Materials"), and the
                  relationship with AIM Members, including, without limitation,
                  all aspects of such relationship specified in this Section 5.
                  AOL shall own any and all rights in the call detail records
                  generated in providing the AIM IP Telephony Services which
                  shall be treated as Confidential Information for purposes of
                  this Agreement (collectively, the "Call Detail Records"). AOL
                  hereby grants N2P a non-exclusive, non-transferable,
                  worldwide, [****] license to use the Call Detail Records only
                  to the extent necessary to provide the AIM IP Telephony
                  Services to be provided by N2P hereunder (including any
                  related planning and development). Such license shall continue
                  through the end of the Term, but shall survive expiration of
                  the Term with respect to the provision by N2P of the PTP
                  Calling Card Service. Without limiting the foregoing, N2P
                  acknowledges and agrees that AOL may, in its sole discretion,
                  promote, distribute and/or use the AIM Card (in accordance
                  with applicable law) as an electronic debit card throughout
                  the Term in connection with any other products and services
                  offered by AOL and/or its partners, in AOL's sole discretion,
                  [****] be mutually agreed upon by the Parties. N2P shall
                  perform any and all reasonably requested development services
                  (i.e., considering available technology, regulatory
                  requirements, and time required) for such use, and [****] in
                  connection with material, incremental development and/or
                  customization required for such use by AOL after the Effective
                  Date, subject to AOL's prior written consent.

         5.2      AIM Member Relationship.

                  5.2.1 Registration Information. In order to use the Surcharged
                  AIM IP Telephony Services, an AIM Member will be required to
                  register for such AIM IP Telephony Services. The Parties shall
                  determine by mutual agreement the terms and conditions of use
                  to be agreed to by such AIM Members (including, without
                  limitation, with respect to any special access codes to be
                  used by such AIM Members in connection with the AIM IP
                  Telephony Services, provided, that neither Party shall
                  unreasonably withhold such agreement with respect to the use
                  of such special access codes), and AOL shall determine both
                  (i) the information to be collected from the AIM Members as
                  part of the registration process (provided that such
                  information shall in any event include information that N2P
                  reasonably requests in connection with the provision of the
                  AIM IP Telephony Services, including, without limitation, any
                  Personal Identification Numbers (PINs) for use by AIM Members
                  in connection with the AIM IP Telephony Services) and (ii) any
                  domain names, unique identifier


                                       14
<PAGE>   15
                                                               EXECUTION VERSION


                  numbers, e-mail addresses and passwords to be assigned and/or
                  used by such AIM Members in connection with such AIM IP
                  Telephony Services. Registration for the AIM IP Telephony
                  Services shall take place at the Support Area or at such other
                  location as may be mutually agreed upon by the Parties. AOL
                  shall use reasonable efforts to build into the end of the
                  registration process for the AIM Service (the "AOL
                  Registration Process") a sub-routine for the registration for
                  the AIM IP Telephony Services. Notwithstanding the foregoing,
                  in the event that any AIM Members shall not have registered
                  for the Surcharged AOL IP Telephone Services prior to
                  attempting to use any such service, AOL shall cause any such
                  AIM Member to register for the Surcharged AIM IP Telephony
                  Services prior to the use thereof. N2P shall determine the
                  pricing for the Core Premium Services and other AIM IP
                  Telephony Services to be provided by N2P hereunder. In
                  addition, N2P shall handle the assignment of applicable phone
                  numbers to AIM Members (using the AIM Member unique identifier
                  number as an identifier and provided that such phone numbers
                  and special access codes (unless otherwise agreed upon in
                  writing by the Parties) shall be different from any phone
                  numbers and access numbers used in connection with any N2P
                  Services), and shall handle the billing and collection of any
                  fees or other amounts to be charged to AIM Members from time
                  to time in connection with the AIM IP Telephony Services
                  (collectively, the "IPT Fees"); provided, however that, unless
                  otherwise expressly consented to in writing by AOL, N2P shall
                  not directly contact or communicate with any AIM Members other
                  than in connection with the billing and collection of the IPT
                  Fees, or in connection with maintenance and customer support
                  for the AIM IP Telephony Services; provided, further, that
                  such communications shall be limited to obtaining billing
                  information, providing pricing information related to the AIM
                  IP Telephony Services and ensuring collection of the IPT Fees
                  or providing maintenance or customer support, and shall not be
                  used by N2P as a platform to sell, market, advertise or
                  promote any products or services other than the AIM IP
                  Telephony Services.

                  5.2.2 Billing Transition. Notwithstanding the foregoing, at
                  any time during the Term and at AOL's sole discretion, AOL
                  shall have the right to assume responsibility for the
                  aforementioned billing and collection obligations with respect
                  to the IPT Fees (collectively, the "Billing Transition");
                  provided, however, that (i) AOL shall give N2P reasonable
                  advance notice of any such Billing Transition; (ii) the
                  Billing Transition shall be subject to agreement of the
                  Parties on arrangements (a) for N2P to receive the same
                  portion of revenue from the AIM IP Telephony Services as it
                  would have received before the Billing Transition (and on
                  procedures to verify the proper payment of such revenue), (b)
                  for handling fraud, and (c) for the handling of the billing
                  for the PTP Calling Card Service after the Initial Term, and
                  (iii) AOL shall be responsible for all costs and out-of-pocket
                  expenses incurred by N2P in connection with such Billing
                  Transition. In the event of such Billing Transition, N2P
                  hereby agrees to provide AOL with reasonable assistance (and
                  to otherwise cooperate with AOL), [****], regarding such
                  Billing Transition, and following such Billing Transition, AOL
                  shall use commercially reasonable efforts to ensure that the
                  billing services comply in all material respects with the
                  standards set forth in Exhibits B and C of this Agreement.

         5.3      AIM Member Information and Solicitation.

                           5.3.1 Ownership of AIM Member Information. AOL shall
                  own any and all information collected from AIM Members in
                  connection with the AIM IP Telephony Services, including,
                  without limitation, information collected during the
                  registration processes for the AIM Service and/or any AIM IP
                  Telephony Service, respectively, and information then or
                  subsequently obtained from any use of the AIM Service and/or
                  any AIM IP Telephony Services, including without limitation
                  [****] (collectively, "User Information"). All User
                  Information shall be deemed Confidential Information of AOL.
                  N2P agrees, both during and after the Term, not to (i) use any
                  User Information for any purpose other than in connection with
                  the operation of the AIM IP Telephony Services or (ii)
                  disclose any such information to any third party without the
                  prior written consent of AOL, which consent may be granted or
                  withheld in AOL's sole and absolute discretion; provided,
                  however, that N2P may disclose


                                       15
<PAGE>   16
                                                               EXECUTION VERSION


                  User Information solely as necessary (and only to the extent
                  necessary) to comply with applicable laws, regulations and
                  government orders or requests; provided, further, that N2P
                  shall use all reasonable efforts to limit any such disclosure
                  to the maximum extent possible and to provide AOL with as much
                  advance written notice of N2P's intended use or disclosure as
                  is practicable. N2P agrees to comply with the AOL Privacy
                  Policy to the same extent as AOL, as such policy exists on the
                  Effective Date (i.e., the AOL Privacy Policy), as the same may
                  be modified by AOL and notified to N2P from time to time. N2P
                  shall not sell, license, rent or otherwise transfer any AIM
                  Member Information or any list of AIM Members for any purpose
                  whatsoever, without AOL's prior written consent.
                  Notwithstanding the foregoing, N2P shall have the right to use
                  User Information to the extent necessary to provide the PTP
                  Calling Card Service to then-existing AIM Member customers
                  following the expiration of the Initial Term, and AOL shall
                  provide N2P with the customer records and other information to
                  the extent necessary for N2P to continue providing the PTP
                  Calling Card Service to such customers for the [****] period
                  immediately following the expiration of the Initial Term,
                  subject to Section 5.3.2 and 5.3.3 of this Agreement and
                  prohibitions, if any, under applicable law.

                           5.3.2 No Competitive Solicitation. [****].

                           5.3.3 No Communication. During the Term and for the
                  [****] period following the expiration or termination of this
                  Agreement (and without limiting any other provision of this
                  Agreement, including Section 5.3.1), N2P agrees not to send
                  any AIM Member any messages or communications on or through
                  the Qualified AIM Services for any commercial purpose, unless
                  N2P has an Independent Business Relationship with such AIM
                  Member. Any commercial e-mail communications (i.e., e-mail
                  communications offering products or services) to AIM Members
                  on or through the AIM Service or the AIM IP Telephony Services
                  which are otherwise permitted hereunder (i.e., permitted as
                  exceptions to general prohibitions included in this Agreement)
                  shall include a prominent and easy means to "opt-out" of
                  receiving any future commercial e-mail communications from
                  N2P. The Parties acknowledge that any incidental (i.e., de
                  minimis) failure by N2P to comply with the terms of this
                  provision shall not be deemed a material breach of this
                  Agreement; provided, however, that N2P shall take appropriate
                  steps to prevent any further failure to comply with the terms
                  of this Section 5.3.3.

6.       TECHNICAL SUPPORT

                  N2P shall provide all frontline technical and customer support
                  to AIM Members as set forth in Exhibit B, including, without
                  limitation, technical and customer support for AIM Members who
                  have problems with, or questions concerning, the installation,
                  use, operation or maintenance of the AIM IP Telephony Service
                  (collectively, the "Frontline Support"). The Parties
                  acknowledge that N2P may provide such Frontline Support using
                  e-mail and/or telephone support, at N2P's option. N2P shall,
                  [****], provide to AOL the back-end support regarding the AIM
                  IP Telephony Service specified on Exhibit D. During the Term,
                  each Party will designate one (1) internal technical contact
                  (each such contact, a "Technical Liaison") and will conduct
                  technical communication activities as may be necessary for the
                  optimization of the integration of the AIM IP Telephony
                  Services into the AIM Service. AOL will use commercially
                  reasonable efforts to provide technical and marketing
                  assistance, including facilitating the maintenance of regular
                  communication channels between relevant personnel, for the
                  purpose of assisting both Parties in abiding by their
                  respective obligations under this Agreement. The initial
                  Technical Liaison for N2P shall be [****], and the initial
                  Technical Liaison for AOL shall be [****], unless otherwise
                  designated from time to time by the Parties. Each Party may
                  change its Technical Liaison from time to time, in its sole
                  discretion. Unless otherwise agreed upon by the Parties, N2P
                  shall not be obligated to provide support for any
                  modifications or


                                       16
<PAGE>   17
                                                               EXECUTION VERSION


                  additions to the AIM IP Telephony Services carried out by AOL
                  (or carried out for AOL by a third party not contracted or
                  subcontracted by or on behalf of N2P); provided, however, that
                  where not required to provide such support pursuant to the
                  terms of this Section 6, N2P shall assist in the support of
                  such work to the extent necessary for either Party to comply
                  with its obligations under this Agreement.


7.       PAYMENT AND REVENUE PROVISIONS

         7.1      Guaranteed Payments; Refund. In partial consideration for
                  [****] marketing of the AIM IP Telephony Services, [****]. In
                  the event of any termination of this Agreement before
                  expiration of the Initial Term in accordance with (i) Section
                  16.2 due to a material breach by AOL of this Agreement, (ii)
                  Section 16.3 due to a Change of Control of AOL by a N2P
                  Competitor or a Parent Company Competitor or (iii) Section
                  16.5 due to the occurrence of a Regulated Entity Event, [****]
                  shall refund to [****] (e.g., if such termination occurs on
                  the [****] anniversary of the Effective Date, and [****] has
                  paid [****] in guaranteed payments as required by the terms of
                  this Agreement, [****] shall refund to [****] of such
                  guaranteed payments, [****]. In the event of any termination
                  of this Agreement before the expiration of the Initial Term in
                  accordance with Section 16.6(i)(c) or Section 16.6(i)(d), then
                  [****] shall refund to [****] of the pro rata portion (based
                  on a [****]) of any guaranteed payments made by [****] prior
                  to the date of such early termination. In partial
                  consideration for such guaranteed payments, [****] shall
                  provide [****] during the Initial Term with promotional
                  placements (on areas of the [****] Service or other Web
                  properties solely controlled by [****], to be determined by in
                  its reasonable discretion as further set forth in Section
                  4.1.4) with a value of [****] in Year [****] (based on amounts
                  for comparable Advertisements set forth on [****] then-current
                  advertising rate card).

         7.2      Net Advertising Revenue for IP Telephony Services.

                           7.2.1 Advertising Sales. AOL shall have the right to
                  license or sell promotions, advertisements, links,
                  sponsorships, pointers or similar services or rights
                  ("Advertisements") through the AOL Service and the AIM
                  Service, subject to AOL's then-applicable advertising
                  policies.

                  7.2.2    Revenue Sharing.

                           (a) Net Advertising Revenue. As partial consideration
                  for its marketing efforts hereunder, [****] shall retain
                  [****] of the Net Advertising Revenue. [****] shall pay
                  [****], within [****] following the end of each quarter during
                  the Term, the remaining [****] of the Net Advertising Revenue
                  that is actually collected by [****] or any Affiliate of AOL
                  (collectively, the "Advertising Revenue Share").

                           (b) Net Button Advertising Revenue. In the event that
                  [****] sells (which such decision to sell shall be in [****]
                  sole discretion) any buttons that appear on the [****] IP
                  Telephony client (the "Special Buttons"), (i) [****] shall
                  receive (1) [****] of the Net Button Advertising Revenue
                  generated from the sale (without N2P participation or support)
                  of any such Special Button or (2) [****] of the Net Button
                  Advertising Revenue generated from the sale (with [****]
                  participation or support) of any such Special Button, and (ii)
                  [****] shall retain the remainder of such Net Button
                  Advertising Revenue (clauses (i) and (ii) above, collectively,
                  the "Net Button Advertising Revenue Share"). Notwithstanding
                  the foregoing, in no event shall the total portion of the Net
                  Button Advertising Revenue received by [****] during the Term
                  exceed [****] (i.e., after the receipt by [****] in Net Button
                  Advertising Revenue, [****] shall retain [****] of such Net
                  Button Advertising Revenue), except as otherwise mutually
                  agreed to by the Parties in writing. In the event that [****]
                  utilizes such


                                       17
<PAGE>   18
                                                               EXECUTION VERSION


                  Special Buttons to promote any [****] or other commercial
                  products or services, [****] shall utilize a portion of such
                  Special Buttons (i.e., at least one such Special Button) to
                  promote the [****] IP Telephony Services.

                  7.2.3 Definition of Net Advertising Revenue. For purposes of
                  this Agreement, "Net Advertising Revenue" shall mean, for any
                  calendar quarter, [****] (or, if no such commissions were
                  incurred, [****] of the gross revenues received by AOL for
                  such Advertisements). If Advertisements in the Designated
                  Advertising Areas are sold or otherwise made available to a
                  party that also purchases or obtains Advertisements through
                  one or more other areas or media of AOL or an Affiliate
                  (collectively, a "Combined Sale"), the revenue from the
                  Combined Sale shall be allocated [****] between such
                  Designated Advertising Areas and such other areas or media
                  (based on list prices for such Designated Advertising Areas
                  and other areas or media). For the avoidance of doubt, [****].

                  7.2.4 Ownership of Advertising. The right of N2P to
                  participate in the Net Advertising Revenue pursuant to the
                  provisions of this Section 7.2 shall in no way create any
                  ownership interest in N2P with respect to AOL advertising
                  inventory. AOL owns all right, title and interest in and to
                  the Advertisements and promotional spaces within the AIM
                  Service, including the Support Area and the AIM Client, and
                  AOL has the sole authority to market and sell such
                  Advertisements; provided, however, that AOL agrees that,
                  during the Initial Term within the Designated Advertising
                  Areas, AOL shall not include any Advertisements for (or sell
                  any advertising inventory to) N2P Competitors with respect to
                  (i) the Core Premium Services (to the extent that N2P enjoys
                  exclusivity with respect thereto under this Agreement) and
                  (ii) any Optional Service(s) or Expanded Service(s) which the
                  Parties mutually agree from time to time shall be exclusive to
                  N2P). Further, AOL shall be responsible for all obligations,
                  liabilities and duties under any and all agreements that AOL
                  has with third parties and otherwise with regard to such
                  Advertisements, including serving such advertisements, subject
                  to Section 15 of this Agreement.

                  7.3      Transaction Revenues Sharing Arrangement.

                  7.3.1 Revenue Threshold. If at any time during each of Years
                  One through Three or the Renewal Term of this Agreement the
                  amount of Transaction Revenues received by N2P during such
                  Year exceeds [****] (for each such Year, the "Revenue
                  Threshold"), then N2P will pay AOL, in partial consideration
                  for AOL's marketing and distribution efforts hereunder,
                  [****]. N2P will pay all of the foregoing amounts within
                  [****] following the end of the Year in which the applicable
                  Transaction Revenues were received. At the end of each such
                  Year, the calculation of Transaction Revenues for purposes of
                  this Section 7.3.1 shall recommence. N2P shall have the right
                  to collect and retain all [****] other than the [****] paid to
                  or retained by AOL. To the extent mutually agreed upon by the
                  Parties in writing in connection with any Billing Transition,
                  AOL shall be responsible (following any such Billing
                  Transition) for calculating the [****] and for paying N2P its
                  portion of such [****] as contemplated by this Section 7.3.1.

                  7.3.2 Revenue Share. The "Revenue Share" shall mean the
                  amounts to be paid to AOL (in each case, determined as a
                  percentage of Incremental Transaction Revenues) set forth on
                  Exhibit H hereto.

                  7.3.3 [****] Users. To the extent that N2P is required to
                  share revenue with [****] (pursuant to agreements in full
                  force and effect on the Effective Date) for transaction
                  revenues generated with respect to the Core Premium Services,
                  any Transaction Revenue received by N2P [****] with respect to
                  the Core Premium Services shall not constitute Transaction
                  Revenues for purposes of this Section.


                                       18
<PAGE>   19
                                                               EXECUTION VERSION


         7.4      No Other Revenue Sharing. Except as expressly provided in this
                  Section 7 and on Exhibit H, neither Party shall be entitled to
                  any revenues derived from, or related to, the activities of
                  the other Party.

         7.5      Alternative Revenue Streams. In the event that N2P receives or
                  desires to receive (directly or indirectly) any compensation
                  in connection with the AIM Service from the sale of any
                  Products other than the AIM IP Telephony Services or as
                  otherwise agreed to by the Parties (an "Alternative Revenue
                  Stream"), N2P will promptly inform AOL in writing, and the
                  Parties will negotiate in good faith regarding whether N2P
                  will be allowed to market the Products producing such
                  Alternative Revenue Stream (the "Alternative Products")
                  through the AIM Service, and if so, the equitable portion of
                  revenues from such Alternative Revenue Stream (if applicable)
                  that will be shared with AOL.

         7.6      Reports and Payments. Each Party (the "Paying Party") shall
                  comply with the following requirements in connection with its
                  payment obligations to the other Party (the "Payee Party")
                  under this Agreement: Within [****] following the end of each
                  payment period, the Paying Party shall provide the Payee Party
                  with a report that contains information detailing the amount
                  payable for such payment period. Such report shall, with
                  reasonable detail, explain the basis upon which such payment
                  has been determined and shall be accompanied by payment in
                  full of all amounts indicated on such report as due for such
                  period. Each such report shall constitute Confidential
                  Information of the Paying Party. Without limiting the
                  generality of the foregoing:

                           7.6.1 Reports on Transaction Revenues. N2P will
                  provide AOL with a report in a mutually agreed-upon format,
                  detailing the following activity in such period (and any other
                  information mutually agreed upon by the Parties as required
                  for measuring Transaction Revenues): [****] AOL will be
                  entitled to use the Sales Reports only in its internal
                  business operations, subject to the terms of this Agreement.
                  The report will also contain information which supports the
                  payment based on Transaction Revenues, including information
                  identifying [****].

                  7.6.2 Reports on Advertising Revenue Share. AOL will provide
                  N2P with a quarterly report in a mutually agreed-upon format,
                  detailing the following in such quarter (and any other
                  information mutually agreed upon by the Parties as required
                  for measuring Advertising Revenues): [****].

         7.7      Late Payments; Wired Payments. All amounts owed hereunder not
                  paid when due and payable will bear interest from the date
                  such amounts are due and payable at the prime rate in effect
                  at such time. All payments required to be paid to AOL
                  hereunder will be paid in immediately available,
                  non-refundable U.S. funds wired to the "America Online"
                  account, Account Number [****]. All payments required to be
                  paid to N2P hereunder will be paid in immediately available,
                  non-refundable U.S. funds wired to an account to be designated
                  by N2P (within thirty (30) days following the Effective Date)
                  in a written notification to AOL.


         7.8      Audit Rights. Each Party (as Paying Party) will maintain
                  complete, clear and accurate records of the information
                  required to determine the amounts of payments made hereunder.
                  For the sole purpose of ensuring compliance with the payment
                  obligations of this Agreement, either Party (as Payee Party)
                  will have the right to request that an independent certified
                  accountant selected by the Parties (and which accountant
                  enters into a confidentiality agreement mutually agreed to by
                  the Parties) conduct (no more than twice per calendar year of
                  this Agreement) a reasonable and necessary inspection of
                  portions of such books and records as are necessary to verify
                  the correctness of the payments made hereunder. Any such audit
                  may be conducted after twenty (20) business days prior written
                  notice to the Paying Party. The Payee Party shall bear the
                  expense of any audit conducted


                                       19
<PAGE>   20
                                                               EXECUTION VERSION


                  pursuant to this Section 7.8 unless such audit shows an error
                  in the Payee Party's favor amounting to a deficiency in excess
                  of [****] of the actual amounts payable to the Payee Party
                  hereunder, in which event the Paying Party shall bear the
                  reasonable costs and expenses incurred in connection with such
                  audit. The Paying Party shall pay the Payee Party the amount
                  of any deficiency discovered by the Payee Party within [****]
                  after receipt of notice thereof from the Payee Party, except
                  to the extent disputed in good faith by the Paying Party.

         7.9      Taxes. Each Party will collect and pay, and indemnify and hold
                  harmless the other Party from, any sales, use, excise, import
                  or export value added or similar tax or duty required to be
                  collected and paid by such Party, including any penalties and
                  interest, as well as any costs associated with the collection
                  or withholding thereof, including attorneys' fees
                  (collectively, the "Taxes").

         7.10     Fraudulent Transactions. To the extent permitted by applicable
                  law, N2P will (i) provide AOL with prompt notice of any
                  fraudulent order (a "Fraudulent Order"), including the date,
                  screen name or e-mail address and amount associated with such
                  order, promptly following N2P obtaining knowledge that the
                  order is, in fact, fraudulent and (ii) as promptly as possible
                  following the occurrence of any such Fraudulent Order (but in
                  no event later than one (1) month after the occurrence
                  thereof), provide AOL with a report regarding any such order
                  and the steps taken by N2P with respect thereto.

         7.11     [****]

8.       STOCK WARRANTS

         Attached hereto as Exhibit G is a form of amended and restated common
         stock warrant to be executed by N2P on behalf of AOL, or, if AOL so
         directs N2P in writing, any parent, subsidiary or affiliate entity of
         AOL). In the event that AOL directs N2P to issue such warrant to such
         other entity, the Parties agree that such entity shall have the right
         to enforce the terms of such warrant against N2P.

9.       EXCLUSIVITY

         9.1      Scope.

                           9.1.1 N2P Exclusivity. Subject to the provisions of
                  Section 1.1.8 (with respect to other AOL or third party PC to
                  PC communications products), and Section 4.14(d), and except
                  to the extent that AOL is expressly relieved of its
                  exclusivity obligations under this Agreement, N2P shall be the
                  exclusive provider of the Core Premium Services on the AIM
                  Service for the period of [****] immediately following the
                  Effective Date (the "N2P Exclusivity"); [****]. Provided that
                  N2P retains exclusivity hereunder with respect to any Core
                  Premium Service, AOL will not promote on the AIM Service any
                  IP Telephony service which is comparable to such Core Premium
                  Service. The Parties hereby acknowledge and agree that the N2P
                  Exclusivity may be terminated with respect to particular AIM
                  IP Telephony Services in accordance with the terms of this
                  Agreement.

                           9.1.2    [****].

         9.2      Optional Services. With respect to all other IP Telephony
                  services not expressly contemplated by this Agreement, [****]
                  with respect to the offering of such additional services
                  through the AIM Service. In the event that the Parties cannot
                  agree, within such time period, to the terms and conditions
                  regarding the provision of any such additional service to AIM
                  Members through the AIM Service, AOL shall have the right to
                  offer such additional service(s) to AIM Members through any
                  third party (including, without limitation, [****].


                                       20
<PAGE>   21
                                                               EXECUTION VERSION


         9.3      Termination of Exclusivity. In the event that [****] is
                  entitled to relief from the [****] as to a particular Core
                  Premium Service and/or country in accordance with the express
                  terms and conditions of this Agreement, then only the [****]
                  with respect to such Core Premium Service and/or country (as
                  the case may be and subject to Section 16 hereof) shall
                  terminate.


         9.4      Exception to Exclusivity. For the avoidance of doubt, the
                  Parties acknowledge that the N2P Exclusivity does not preclude
                  the listing of N2P Competitors or any AOL PC-to-PC
                  communication function in any whites pages, yellow pages or
                  other online search or directory service, subject to Section
                  4.1.4 and Section 7.2.4.

10.      LICENSE FROM N2P

         10.1     Licenses.

                           10.1.1 Software License. Subject to all the terms and
                  conditions of this Agreement, N2P hereby grants to AOL a
                  worldwide, non-exclusive, non-transferable, [****] license for
                  the Term to use, reproduce, distribute directly and
                  indirectly, transmit, display, perform and sublicense (i.e.,
                  grant to end-users the right to use) and adapt the AOL IP
                  Telephony Software, including any and all components (e.g.,
                  APIs, and the reference implementations for the SDK and APIs)
                  contained in the AOL IP Telephony Software necessary to
                  effectuate the provision of the AIM IP Telephony Services to
                  AIM users, and the use by end-users of the AIM IP Telephony
                  Services, in each case, in object code form only (except as
                  provided in Sections 10.1.2 and 10.2) in accordance with the
                  terms of this Agreement. To the extent reasonably requested by
                  AOL, N2P shall deliver the AOL IP Telephony Software
                  electronically to AOL.

                           10.1.2 SDK License. Within thirty (30) days from the
                  Effective Date, N2P shall provide AOL [****] with a software
                  development kit ("SDK"), and updates thereto during the Term,
                  which shall contain such object code (and/or source code, if
                  necessary) and/or other applicable technology, relating to the
                  AOL IP Telephony Software or otherwise, to the extent
                  reasonably necessary for AOL to integrate all of the Core
                  Premium Services within the AIM Client, and perform any and
                  all of its other obligations and exercise its rights under
                  this Agreement. Without limiting the provisions of Section
                  10.1.1, N2P agrees that AOL shall have the right to use, adapt
                  and copy, in any manner whatsoever, the components contained
                  in the SDK provided by N2P (e.g., object code) in connection
                  therewith. Notwithstanding the foregoing, in the event that
                  N2P does not provide AOL with such SDK within [****] of the
                  Effective Date, in addition to any other remedies AOL may
                  have, AOL shall have the right to terminate the exclusivity
                  with respect to all of the Core Premium Services. In addition
                  to the foregoing, AOL shall have the right to request, from
                  time to time during the Term, that N2P provide AOL with
                  additional SDKs which shall contain such source code (as
                  necessary), object code, and/or other applicable technology
                  necessary to allow AOL to integrate any and all additional AIM
                  IP Telephony Services (e.g., the Optional Services, and/or the
                  Expanded Services ) designated by AOL within the AIM Client.
                  In such event, N2P shall provide AOL with such additional
                  SDK(s) as the necessary technology becomes generally available
                  (following such request from AOL, which request shall contain
                  reasonable specificity of the technology needed from N2P by
                  AOL for such integration), and such additional SDK(s), and the
                  technology contained therein, shall be deemed through this
                  reference incorporated within the licenses granted to AOL in
                  this Section 10.1.2 and in Section 10.1.1.

                           10.1.3 Purpose of License. The foregoing license is
                  expressly intended to permit (and limited to permitting) AOL
                  to effectuate all of its rights and conduct all of the
                  business expressly contemplated hereunder, including
                  distributing the AIM IP Telephony Services


                                       21
<PAGE>   22
                                                               EXECUTION VERSION


                  pursuant to the terms and conditions of this Agreement. Except
                  as set forth in this Section 10.1, Sections 10.2 and 12.1 or
                  as otherwise set forth in this Agreement (including, without
                  limitation, with respect to the AOL GUI), AOL acknowledges and
                  agrees that N2P and its licensors retain all rights, title and
                  interest in and to the AOL IP Telephony Software in both
                  object and source code forms, and, except pursuant to the
                  Source Code Escrow Agreement, or as otherwise set forth in
                  this Agreement, AOL shall not have any rights to use such code
                  licensed hereunder following termination of this Agreement
                  without N2P's consent. AOL shall not have any right under any
                  circumstances, or authorize any third party (which, for
                  avoidance of doubt, includes any Affiliate of AOL), to (i)
                  [****] the AOL IP Telephony Software (other than adaptation in
                  accordance with Sections 10.1.1, 10.1.2, or in connection with
                  AOL's integration obligations hereunder, or as otherwise
                  authorized by the Source Code Escrow Agreement or license
                  described in Section 10.2), (ii) [****], or otherwise [****]
                  the source code for or underlying algorithms, processes or
                  methods of the AOL IP Telephony Software that is provided in
                  object code form, or (iii) [****] the AOL IP Telephony
                  Software to any third party (other than as expressly provided
                  in this Agreement). All copies of the AOL IP Telephony
                  Software made hereunder shall include all proprietary notices
                  included on the copy provided by N2P, and AOL shall not
                  remove, deface or obscure or authorize to be removed, defaced
                  or obscured any of N2P's or its licensors' proprietary rights
                  notices on or in the AOL IP Telephony Software or on output
                  generated by the software; provided that the placement of such
                  notices, if any, in the AOL IP Telephony Software that are
                  visible in the user interface of such software shall be
                  subject to AOL's prior written approval, which approval will
                  not be unreasonably withheld. AOL agrees that any and all
                  copies of the AOL IP Telephony Software distributed to third
                  parties shall be pursuant to binding license agreements no
                  less restrictive or protective of N2P's rights than this
                  Section 10.1. AOL agrees that any material violation of this
                  Section 10.1 by AOL that is not cured by AOL within [****]
                  shall constitute a material breach of this Agreement. N2P
                  agrees to provide the AOL IP Telephony Software in object code
                  form (except as set forth in Sections 10.1.1, 10.1.2, 10.2 or
                  otherwise), including all required Documentation, to AOL as
                  and when needed for AOL to exercise its rights under this
                  Agreement. For the avoidance of doubt, the Parties acknowledge
                  that the AOL IP Telephony Software, may not be provided by N2P
                  to any third party.

         10.2     Source Code License and Escrow.

                           10.2.1 Escrow Agreement. N2P and AOL will enter into
                  an escrow agreement (the "Source Code Escrow Agreement"),
                  containing terms and conditions subject to the mutual
                  agreement of the Parties, for the limited use by AOL of the
                  AOL IP Telephony Software in source code form (the "Source
                  Code") solely for the purposes of undertaking any activity
                  which N2P is obligated to perform or undertake hereunder and
                  fails to perform or undertake as required hereunder. The
                  Source Code Escrow Agreement shall provide that AOL shall be
                  entitled to a copy of the Source Code only upon the occurrence
                  of all of the following four (4) events (collectively, the
                  "Release Conditions"): (i) N2P's material breach of its
                  material obligations hereunder to provide, maintain or support
                  the AOL IP Telephony Software, which breach materially
                  adversely affects the AIM IP Telephony Services; (ii) AOL's
                  written notice to N2P detailing such material breach; and
                  (iii) N2P fails to cure such material breach within ninety
                  (90) days of receipt of such notice; or (iv) N2P's failure to
                  provide the SDK to AOL to AOL's reasonable satisfaction,
                  pursuant to Section 10.1.2. The license will not include any
                  right to [****] the Source Code to any third party without
                  N2P's prior written consent, and the Source Code Escrow
                  Agreement will contain provisions, reflective of the
                  sensitivity of the Source Code, to preclude the unauthorized
                  use or disclosure of the Source Code or information derived
                  therefrom. Promptly after execution of this Agreement, and in
                  any event within [****], N2P and AOL shall negotiate and enter
                  into the Source Code Escrow Agreement with Data Securities
                  International or another escrow holder acceptable to each
                  Party. The Source Code Escrow Agreement will contain
                  provisions for N2P to provide AOL with reasonable assistance
                  in understanding and using the Source Code upon occurrence of
                  the Release Conditions.


                                       22
<PAGE>   23
                           10.2.2 Limited Source Code License. To the extent
                  reasonably necessary for AOL to modify, develop, add, delete
                  or use any functionality or features of the AIM IP Telephony
                  Services in connection with the development of any Additional
                  AOL Modifications pursuant to Section 2.3.4, N2P shall provide
                  to AOL APIs or SDKs to the AOL IP Telephony Software so that
                  such Additional Modifications or other obligations under this
                  Agreement (e.g., Section 2.1) (whether developed by N2P, AOL
                  or any third party) can interoperate with (including use of
                  the principal functions of) the AOL IP Telephony Software;
                  provided, however, that, to the extent that such APIs or SDKs
                  are insufficient to enable such interoperability, N2P shall
                  either (i) modify, as promptly as commercially practicable,
                  the APIs or SDKs [****], the AOL IP Telephony Software or the
                  Additional Modifications to enable such interoperability, or
                  (ii) in the event that (a) N2P does not perform the work
                  described in clause (i) of this Section 10.2.2 as promptly as
                  commercially practicable or (b) elects not to perform such
                  work, provide to AOL portions of the Source Code for the AOL
                  IP Telephony Software (and grant a license) necessary to
                  permit AOL to modify the APIs, SDKs, or AOL IP Telephony
                  Software to enable such interoperability. If N2P elects to do
                  the modifications, it shall make the modifications as promptly
                  as is commercially reasonable. AOL's use of the Source Code
                  pursuant to this Section 10.2.2 will not include any right to
                  sublicense, transfer, assign, disclose or distribute the
                  Source Code to any third party without N2P's prior written
                  consent, and will be subject to mutually agreed provisions,
                  reflective of the sensitivity of the Source Code, to preclude
                  the unauthorized use or disclosure of the Source Code or
                  information derived therefrom.

                           10.2.3 Limits on Use. AOL's use of the Source Code
                  shall not exceed the narrow purpose set forth in Section
                  10.2.1 or Section 10.2.2.

         10.3     Trademark License. Subject to the terms and conditions of this
                  Agreement, N2P will be entitled to use the following trade
                  names, trademarks, and service marks of AOL: the "AOL(TM)"
                  trademark and service mark and other trademarks and service
                  marks relating specifically to one or more of the AIM IP
                  Telephony Services, provided that AOL has approved in writing
                  the use of each such other trademarks or service marks
                  (collectively, the "AOL Marks"). Subject to the terms